It just started doing it this week.. And another thing, why is it so hot?

Probably because the battery is getting a workout from being drained by something. Could be a rogue app or something, or a defect. Maybe restore it back to factory settings but don't sync any apps over, then set all the power saving tricks. Keep it plain vanilla except for music for a few days and see if it helps. Don't use the EQ either.

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